Miniature rose plant named ‘KORpot064’

ABSTRACT

‘KORpot064’ is a new and distinct variety of  Rosa hybrida  which is characterized by the combination of a compact and upright growth habit, dark green and glossy foliage, very good resistance to  Botrytis  and powdery mildew, deep pink very-double flowers, and very good shelf life as a pot plant. The new variety propagates successfully by stem cuttings and has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The Latin name of the genus and speciesof the novel variety disclosed herein is Rosa hybrida.

Variety denomination: The inventive variety of Rosa hybrida disclosedherein has been given the variety denomination ‘KORpot064’.

BACKGROUND OF THE INVENTION

Parentage: The Rosa hybrida variety ‘KORpot064’ is the result of acontrolled cross-pollination breeding program carried out by theinventor in Offenseth-Sparrieshoop, Germany. The objective of the saidbreeding program was to create a new and distinct rose plant with uniquequalities, such as:

-   -   1. Uniform growth and flowering;    -   2. Abundant attractive pink colored recurrent flowers;    -   3. Attractive and abundant foliage; and    -   4. Excellent shelf life for the plant when grown as a commercial        pot rose.

This combination of qualities is not present in prior rose cultivarsknown to the inventor. These objectives have been substantially achievedand in that distinguish ‘KORpot064’ from all other varieties known tothe inventor.

‘KORpot064’ is a seedling selection which resulted from the controlledpollination of an unnamed Rosa hybrida female breeding line developedand owned by the same inventor, the seed parent, and Rosa hybrida‘RUId244a’ (not patented), the pollen parent, during the summer of 2011.As part of a rose development program, Tim-Hermann Kordes germinatedseeds from the aforementioned hybridization during the following winterand conducted evaluations and observations on the resulting seedlings ina controlled environment in Offenseth-Sparrieshoop, Germany. Theresulting seedlings exhibited distinctive physical and biologicalcharacteristics. The new rose plant was selected as a single plant inApril of 2012 from the seedling beds due to its superior characteristicsand asexually propagated for further evaluation. This new anddistinctive rose variety was given the name ‘KORpot064’.

Asexual Reproduction: The first asexual propagation of ‘KORpot064’ wasperformed in June of 2012 at the inventor's nursery inOffenseth-Sparrieshoop, Germany. Subsequently, ‘KORpot064’ has beensuccessfully propagated by stem cuttings in Jackson County, Oreg. Theseinitial and other subsequent propagations conducted in controlledenvironments demonstrate that ‘KORpot064’ reproduces true to type insuccessive generations of asexual reproduction.

SUMMARY OF THE INVENTION

The following characteristics have been repeatedly observed andrepresent the distinguishing characteristics of the new Rosa hybridacultivar ‘KORpot064’. These traits, in combination, distinguish‘KORpot064’ as a new and distinct cultivar.

-   -   1. Rosa hybrida ‘KORpot064’ exhibits a compact, upright growth        habit; and    -   2. Rosa hybrida ‘KORpot064’ exhibits dark green and glossy        foliage; and    -   3. Rosa hybrida ‘KORpot064’ exhibits very good resistance to        Botrytis and powdery mildew; and    -   4. Rosa hybrida ‘KORpot064’ exhibits a very double petal count;        and    -   5. Rosa hybrida ‘KORpot064’ exhibits a medium flower size for a        miniature rose; and    -   6. Rosa hybrida ‘KORpot064’ exhibits very good shelf life as a        pot plant; and    -   7. Rosa hybrida ‘KORpot064’ exhibits deep pink flowers, at        anthesis.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color drawing shows as true as is reasonably possibleto obtain in color photographs of this type, the typical characteristicsof the buds, sepals, reproductive organs, flowers, leaves, prickles, andstems of ‘KORpot064’, taken from twelve month old plants.

DETAILED BOTANICAL DESCRIPTION

The following is a detailed botanical description of a new and distinctvariety of Rosa hybrida known as ‘KORpot064’, based upon fieldobservations made in July of 2015, from twelve month old container-grownplants in a greenhouse environment in Jackson County, Oreg. Thoseskilled in the art will appreciate that certain characteristics willvary with older or, conversely, with younger plants. ‘KORpot064’ has notbeen observed under all possible environmental conditions. Wheredimensions, sizes, colors and other characteristics are given, it is tobe understood that such characteristics are approximations or averagesset forth as accurately as practicable. The phenotype of the variety maydiffer from the descriptions set forth herein with variations inenvironmental, climatic and cultural conditions. Color notations arebased on The Royal Horticultural Society Colour Chart, The RoyalHorticultural Society, London, 2001 edition except where common terms ofcolor are used.

A botanical description of ‘KORpot064’ and comparisons with othervarieties of Rosa hybrida are provided below.

-   General plant description:    -   -   Growth rate.—Moderately vigorous.        -   Growth habit.—Compact and upright.        -   Mature dimensions.—25 to 30 cm tall and 20 cm wide, on            average, when grown as a 10 cm nursery pot.        -   Cold hardiness.—Unknown.        -   Propagation.—Stem cuttings.        -   Disease resistance.—Very good resistance to Botrytis            (Botrytis cinerea), powdery mildew (Sphaerotheca pannosa)            and downy mildew (Peronospora sparsa) in a greenhouse            environment in Jackson County, Oreg.-   Root system: Fibrous.-   Stems:    -   -   Stem color.—Young stems are Yellow-Green Group 144A; mature            stems are Yellow-Green Group 146A.        -   Anthocyanin intonations.—Greyed-Red Group 181A intonations            are present on new growth.        -   Stem surface texture.—Both immature and mature stems exhibit            a smooth texture.        -   Stem dimensions.—Typical mature stems are approximately 20            to 25 cm long and 3 to 4 mm in diameter.        -   Prickles.—Incidence — Present; 10 prickles per 10 cm of            stem, on average. Size — Average length is 3 mm. Immature            prickle color — Yellow-Green Group 145C. Mature prickle            color — Yellow-Green Group 145C and senescing to            Greyed-Orange Group 177B. Anthocyanin intonations — None            present. Shape — Linear. Texture — Smooth.-   Leaves:    -   -   Arrangement.—Imparipinnate compound leaves; mature axillary            leaves consisting of 5 leaflets.        -   Attachment.—Petiolate.        -   Dimensions.—70 to 80 mm long and 55 to 60 mm wide, on            average.        -   Abundance.—Average; approximately 50 to 60 leaves per plant.        -   Stipules.—Size — 10 mm long and 4 mm wide. Stipule color —            Green Group 137A. Anthocyanin intonations — None. Stipitate            glands — Abundant on the margins. Margins — Glandular            toothed. Texture, adaxial surfaces — Smooth with fine white            hairs. Texture, abaxial surfaces — Glabrous. Apex —            Apiculate. Base — Winged.        -   Petiole.—Length — Average 15 mm. Diameter — Average 1.5 mm.            Petiole color, adaxial and abaxial surfaces — Yellow-Green            Group 144A. Margins — Entire with a limited number of            stipitate glands. Anthocyanin intonations — Greyed-Red Group            182A on stipitate glands and occasionally on the adaxial            midrib surface. Prickles — None. Stipitate glands — Limited            number; present on the margins. Texture — Smooth, with            abundant fine white hairs, White Group 155C. Strength —            Somewhat strong.        -   Rachis.—Length — Average 13 mm. Diameter — Average 1 mm.            Color — Green Group 137A on the upper surface and            Yellow-Green Group 144A on the lower surface. Anthocyanin            intonations — Greyed-Red Group 182A on margins. Margins —            Entire. Prickles — A few small prickles on some leaves.            Stipitate glands — Limited number present along margins and            underneath. Pubescence — Abundant fine white hairs, White            Group 155C, on the upper surface. Texture — Upper surface is            smooth; papillate underneath.        -   Leaflets.—Quantity — Normally 5 leaflets on normal leaves in            middle of the stem. Dimensions — Average size of the            terminal leaflet is 35 mm long and 21 mm wide. Shape —            Ovate. Apex — Acuminate. Base — Obtuse. Margins — Serrated;            no undulation. Luster and texture, adaxial surface —            Semi-glossy and smooth. Luster and texture, abaxial surface            — Matte and leathery. Juvenile foliage color, adaxial            surface — Yellow-Green Group 144A. Juvenile foliage color,            abaxial surface — Yellow-Green Group 144A. Mature foliage            color, adaxial surface — Green Group 137A. Mature foliage            color, abaxial surface — Yellow-Green Group 147B.            Anthocyanin intonations — Greyed-Red Group 182A along            margins of juvenile leaflets. Venation — Reticulate.            Petiolule — Dimensions — 1 to 2 mm long and 1 mm in            diameter. Petiolule color, adaxial surface — Green Group            137A. Petiolule color, abaxial surface — Yellow-Green Group            144A with intonations of Greyed-Red Group 182A. Prickles —            None present. Texture, adaxial and abaxial surfaces —            Smooth. Margins — Entire, with limited number of fine hairs            and stipitate glands on both the adaxial and abaxial            surfaces.-   Inflorescence:    -   -   Inflorescence type.—Typically solitary flowers; occasionally            multiple flowers arranged in corymbs. Flowers are held            upright.        -   Blooming habit.—Recurrent.        -   Quantity of flowers.—Generally three to four flower buds per            corymb.        -   Size.—80 mm tall and 80 mm wide, on average.        -   Peduncle of corymb.—Length — 10 mm average length. Diameter            — 2 to 3 mm average diameter. Color — Yellow-Green Group            146A. Anthocyanin intonations — None. Strength — Strong.            Texture — Smooth with a limited number of stipitate glands.            Pubescence — Pubescent; fine white hairs, White Group 155C.-   Flowering laterals: Present below the initiation of inflorescence.    Generally 1 to 2 flowering laterals are present, with 2 to 4 flowers    per flowering shoot.-   Bud:    -   -   Bud form.—Long; pointed ovoid.        -   Size.—Upon opening, 20 to 30 mm in length from base of            receptacle to distal end of bud and 15 mm diameter at its            widest point.        -   Texture.—Smooth.        -   Color, as sepals first unfold.—Red-Purple Group N66B.        -   Color when one-quarter open, inner side.—Marginal zone —            Red-Purple Group N66C. Middle zone — Red-Purple Group N66C.            Basal zone — Green-White Group 157D.        -   Color when one-quarter open, outer side.—Marginal zone —            Red-Purple Group N66B. Middle zone — Red-Purple Group N66B.            Basal zone — Green-White Group 157D.-   Flower:    -   -   Pedicels, solitary flowers and flowers of corymbs.—Surface —            Glabrous with an abundance of stipitate glands are present.            Length — 20 to 35 mm, on average. Diameter — 2 to 3 mm, on            average. Color — Yellow-Green Group 144C. Anthocyanin            intonations — Greyed-Purple Group 178C on stipitate glands            only. Strength — Somewhat strong. Texture — Papillate.        -   Calyx.—General — Comprised of five polysepalous sepals, with            weak foliaceous appendages present on three of the five            sepals. Diameter of calyx — 50 mm, at anthesis. Sepals —            Color, adaxial surface — Yellow-Green Group 144A. Color,            abaxial surface — Yellow-Green Group 147C. Anthocyanin            intonations — Greyed-Purple Group 178C is present only on            stipitate glands. Size — 20 to 30 mm long and 7 mm wide, on            average. Apex — Both cirrose and apiculate apices observed.            Base — Flat at union with receptacle. Quantity — Five.            Texture, adaxial surface — Hoary. Texture, abaxial surface —            Papillate. Margins — Cilliate. Stipitate glands — Limited to            abundant on the abaxial surface.        -   Corolla.—General shape of corolla — Round; rosette. Shape of            corolla when viewed from the side — Upon opening, upper            portion — Flattened convex. Upon opening, lower portion —            Flattened convex. Open flower, upper portion — Flattened            convex. Open flower, lower portion — Flat. Dimensions —            Medium for a miniature rose. When open, the average flower            diameter is 50 to 55 mm and the average flower height is            20 mm. Fragrance — None. Duration — On the plant 18 to 24            days. Senesced petals clinging. Petals — Petal count —            Exhibits very double flowers with approximately 50 petals            under normal conditions. Petal arrangement — Formal. Petal            reflex — Innermost petals are somewhat; outermost petals are            strongly reflexed; occasionally doubly reflexed. Timing of            petal reflex — One-by-one. Petal margin — Entire; innermost            petals are somewhat ruffled. Petal shape — Obovate; some of            the innermost petals are irregular. Apex — Acute. Base —            Cuneate. Dimensions — 14 to 20 mm long and 6 to 20 mm wide.            Texture, inner surface — Smooth. Texture, outer surface —            Smooth. Petal color, upon opening — Outermost petals, inner            surface — Marginal zone — Red-Purple Group N66C. Middle zone            — Red-Purple Group N66D. Basal zone — Green-White Group            157A. Outermost petals, outer surface — Marginal zone —            Red-Purple Group N66C, with intonations of Red-Purple Group            N66D. Middle zone — Red-Purple Group N66C, with intonations            of Red-Purple Group N66D. Basal zone — Green-White Group            157A. Innermost petals, inner surface — Marginal zone —            Red-Purple Group 58C. Middle zone — Red-Purple Group 58D.            Basal zone — Yellow Group 2A. Innermost petals, outer            surface — Marginal zone — Red-Purple Group 58C, with            intonations of Yellow Group 4C on the midrib. Middle zone —            Red-Purple Group 58C, with intonations of Yellow Group 4C on            the midrib. Basal zone — Yellow Group 2B. Basal petal spots,            upon opening — No distinct coloration at the petal base.            Petal color, after opening — Outermost petals, inner surface            — Marginal zone — Red-Purple Group 65A. Middle zone —            Red-Purple Group 65B. Basal zone — White Group 155A.            Outermost petals, outer surface — Marginal zone — Red-Purple            Group 68B, with intonations of White Group 155C. Middle zone            — Red-Purple Group 68B, with intonations of White Group            155C. Basal zone — White Group 155C. Innermost petals, inner            surface — Marginal zone — Red-Purple Group N66C. Middle zone            — Red-Purple Group N66D. Basal zone — White Group 155C.            Innermost petals, outer surface — Marginal zone — Red-Purple            Group N66C, with intonations of White Group 155C. Middle            zone — Red-Purple Group N66C, with intonations of White            Group 155C. Basal zone — White Group 155C. Basal petal            spots, after opening — No distinct coloration at the petal            base. General Tonality — On open flower, Red-Purple Group            62A. No change in the general tonality at the end of the            tenth day. Afterwards, general tonality is Red-Purple 62D.            Petaloids — Quantity — 20 petaloids per flower, on average.            Dimensions — Approximately 3 to 15 mm long and 2 to 5 mm            wide. Color, inner surface — Marginal zone — Red-Purple            Group N66D. Middle zone — Red-Purple Group N66D. Basal zone            — White Group 155A. Color, outer surface — Marginal zone —            Red-Purple Group N66B with intonations of White Group 155A            on the midrib. Middle zone — Red-Purple Group N66C with            intonations of White Group 155A on the midrib. Basal zone —            White Group 155A. Margins — Undulated. Shape — Spatulate;            many petaloids are highly irregular. Apex — Obtuse. Base —            Attenuate. Texture, inner and outer surfaces — Smooth.-   Reproductive organs:    -   -   Stamens.—Quantity — Approximately 50, on average, and            regularly arranged around the styles. Anthers — Shape —            Reniform. Dimensions — 1.5 to 2 mm long and 1 mm wide, on            average. Color — Yellow-Orange Group 16B. Pollen — Scarce.            Pollen color — Greyed Orange Group 164C. Filaments — Color —            Green-Yellow Group 1B. Length — 3 to 4 mm.        -   Pistils.—Quantity — Average; approximately 60. Stigmas —            Dimensions — 0.5 mm long and 0.5 mm wide. Location —            Superior in position to anthers. Color — Greyed-Yellow Group            162D. Styles — Length — Approximately 7 mm long. Color —            Yellow-Green Group 145D, with intonations of Red-Purple            Group N66A.        -   Ovary.—Dimensions — 2 mm long and 1.5 mm in diameter. Color            — Yellow-Green Group 145D.        -   Receptacle.—Shape — Funnel-shaped; occasionally urn-shaped.            Dimensions — Approximately 4 to 5 mm high and 6 to 7 mm            wide. Surface texture and pubescence — Smooth, slightly            glaucous and pubescent; abundance of fine white hairs. Color            — Yellow-Green Group 144B.-   Hips and seed formation: Not observed.

COMPARISONS WITH THE PARENTS

The new rose plant may be distinguished from its seed parent, an unnamedfemale breeding line, by the following combination of characteristics:

-   -   1. ‘KORpot064’ exhibits a deep pink general tonality of the        flower, whereas the seed parent exhibits a cherry red general        tonality of the flower.    -   2. ‘KORpot064’ exhibits a medium flower size for a miniature        rose, whereas the seed parent exhibits a large flower for a        miniature rose.    -   3. ‘KORpot064’ exhibits a very-double flower petal count,        whereas the seed parent exhibits a semi-double flower petal        count.

The new rose plant may be distinguished from its pollen parent, Rosahybrida ‘RUId244a’, by the following combination of characteristics:

-   -   1. ‘KORpot064’ exhibits a deep pink general tonality of the        flower, whereas ‘RUId244a’ exhibits a soft pink general tonality        of the flower.    -   2. ‘KORpot064’ exhibits a mostly solitaire flowers, whereas        ‘RUId244a’ exhibits flowers in small clusters.    -   3. ‘KORpot064’ exhibits very good shelf life as a pot plant,        whereas ‘RUId244a’ exhibits average shelf life as a pot plant.

COMPARISON WITH THE MOST SIMILAR ROSA CULTIVAR KNOWN TO THE INVENTOR

For a comparison, several physical characteristics of the rose variety‘KORcarubo’ (not patented), a rose variety from the same inventor arecompared to ‘KORpot064’ in Chart 1.

CHART 1 Characteristic ‘KORpot064’ ‘KORcarubo’ General tonality of theRed-Purple Group Red-Purple Group flower. 62A. 58C. Average diameter ofthe 50 to 55 mm. 50 mm. corolla, at anthesis. Flower petal count. 50. 30to 40.

That which is claimed is:
 1. A new and distinct variety of rose plantnamed ‘KORpot064’, as described and illustrated herein.